backstitch
A sewing stitch where the needle is inserted behind the previous stitch to create a strong, continuous seam. Often used in hand sewing for durability.
See also: 返し縫い
If you sew with a backstitch, the seam becomes strong.
Compound of 返し (kaeshi, 'returning') + 針 (hari, 'needle'), referring to the needle returning to the previous stitch.